Hi, Thanks for these informations.
But I would like to use the PRU to get data from a fast ADC connected by SPI. I get that there is no example of SPI connection but is it possible ? It seems that the PRU can only access to UART, CFG, eCAP interfaces. Am I right ? Thanks. Ugo Le jeudi 26 septembre 2013 00:05:00 UTC+2, Charles Steinkuehler a écrit : > > On 9/25/2013 4:48 PM, Mark A. Yoder wrote: > > What's the current status of the PRUs? Has anyone produced some > tutorials > > on how to do simple things on it? I've looked at the examples in > Jason's > > post, but more examples on how to do simple things would be helpful. > > I have some basic example code I tried to comment very well for use as > an example of the PRU debugger available with LinuxCNC. It mostly just > sets up the timer portion of the industrial Ethernet controller (the > only part that's documented) and blinks some LEDs. I tried to provide > examples of various assembler features (like using records/structs) as > well as use a variety of coding techniques (including a jump table for > case logic). Perhaps you might find something useful reading through > the code: > > > https://github.com/cdsteinkuehler/linuxcnc/blob/MachineKit-ubc/configs/ARM/PRU-Debugger/pruexample.p > > > ...or if you've got a copy of my MachineKit image you can try running it > with the debugger and single-stepping through the code. > > > For example, how does on set up a double buffer between the ARM and the > PRU > > with the PRU interrupting the ARM when it's finished with one buffer and > is > > working on the next so the ARM can refill the buffer. > > That is totally *NOT* simple and has a *LOT* of places where things can > go wrong (race conditions, deadlocks, cache management, etc). I'll > probably have code that deals with all of this at some point, but I > wouldn't expect it to be a newbie oriented HOWTO code example. > > > Or, examples of the PRU talking to things on the i2c or SPI buses. > > > > Has anyone gotten the PRU to control a quadcopter? > > No to both of the above, AFAIK. > > -- > Charles Steinkuehler > [email protected] <javascript:> > > -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/groups/opt_out.
